rpms at idle speed up to 760 and hot exhaust lite

[mike]

Rawze the light comes on every day and sometimes 2 times it has a factory reman in it . It lost fuel pump took engine out, it was a pacar lease truck. the 870 has the egr on the tubro side and cross over pipe over top of valve cover I believe. would the vg restrict and cause it to do it had a code come up about 2 months ago give me 2 hours before shut down . had it cleared no more codes since then i will try to get somewhere to hook up to computer thanks